If anyone could give me some advice it would be greatly appreciated. I'm building a new how and I'm having a quadrafire 7100 installed. They have it installed, but they did not hook up the auxiliary convection air system, which would be hooked up to outside air to bring in outside air as an option instead of recirculating inside air with the blower system. When I asked the builder about it not being installed, he asked the fireplace installer and they said they typically do not install it but they can if I wanted them to. Would you have it installed or just leave it closed off? They also installed the fireplace with the SL300 series flue (which is an approved flue per the manual) which requires the "CAK-4A" kit which is a collar around the flue where it attaches to the fireplace and has a duct to outside air. Does anyone know how this flue system works? It almost seems like it is using outside air to cool the flue; is this ok? I thought you want to keep your flue temperature up to keep the flue gasses from condensing inside the flue and causing creosote build up.